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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/arch/m68k/kernel/setup.c
4 *
5 * Copyright (C) 1995 Hamish Macdonald
6 */
7
8/*
9 * This file handles the architecture-dependent parts of system setup
10 */
11
12#include <linux/kernel.h>
13#include <linux/mm.h>
14#include <linux/sched.h>
15#include <linux/delay.h>
16#include <linux/interrupt.h>
17#include <linux/fs.h>
18#include <linux/console.h>
19#include <linux/genhd.h>
20#include <linux/errno.h>
21#include <linux/string.h>
22#include <linux/init.h>
23#include <linux/memblock.h>
24#include <linux/proc_fs.h>
25#include <linux/seq_file.h>
26#include <linux/module.h>
27#include <linux/nvram.h>
28#include <linux/initrd.h>
29
30#include <asm/bootinfo.h>
31#include <asm/byteorder.h>
32#include <asm/sections.h>
33#include <asm/setup.h>
34#include <asm/fpu.h>
35#include <asm/irq.h>
36#include <asm/io.h>
37#include <asm/machdep.h>
38#ifdef CONFIG_AMIGA
39#include <asm/amigahw.h>
40#endif
41#include <asm/atarihw.h>
42#ifdef CONFIG_ATARI
43#include <asm/atari_stram.h>
44#endif
45#ifdef CONFIG_SUN3X
46#include <asm/dvma.h>
47#endif
48#include <asm/macintosh.h>
49#include <asm/natfeat.h>
50
51#if !FPSTATESIZE || !NR_IRQS
52#warning No CPU/platform type selected, your kernel will not work!
53#warning Are you building an allnoconfig kernel?
54#endif
55
56unsigned long m68k_machtype;
57EXPORT_SYMBOL(m68k_machtype);
58unsigned long m68k_cputype;
59EXPORT_SYMBOL(m68k_cputype);
60unsigned long m68k_fputype;
61unsigned long m68k_mmutype;
62EXPORT_SYMBOL(m68k_mmutype);
63#ifdef CONFIG_VME
64unsigned long vme_brdtype;
65EXPORT_SYMBOL(vme_brdtype);
66#endif
67
68int m68k_is040or060;
69EXPORT_SYMBOL(m68k_is040or060);
70
71extern unsigned long availmem;
72
73int m68k_num_memory;
74EXPORT_SYMBOL(m68k_num_memory);
75int m68k_realnum_memory;
76EXPORT_SYMBOL(m68k_realnum_memory);
77unsigned long m68k_memoffset;
78struct m68k_mem_info m68k_memory[NUM_MEMINFO];
79EXPORT_SYMBOL(m68k_memory);
80
81static struct m68k_mem_info m68k_ramdisk __initdata;
82
83static char m68k_command_line[CL_SIZE] __initdata;
84
85void (*mach_sched_init) (irq_handler_t handler) __initdata = NULL;
86/* machine dependent irq functions */
87void (*mach_init_IRQ) (void) __initdata = NULL;
88void (*mach_get_model) (char *model);
89void (*mach_get_hardware_list) (struct seq_file *m);
90/* machine dependent timer functions */
91int (*mach_hwclk) (int, struct rtc_time*);
92EXPORT_SYMBOL(mach_hwclk);
93unsigned int (*mach_get_ss)(void);
94int (*mach_get_rtc_pll)(struct rtc_pll_info *);
95int (*mach_set_rtc_pll)(struct rtc_pll_info *);
96EXPORT_SYMBOL(mach_get_ss);
97EXPORT_SYMBOL(mach_get_rtc_pll);
98EXPORT_SYMBOL(mach_set_rtc_pll);
99void (*mach_reset)( void );
100void (*mach_halt)( void );
101void (*mach_power_off)( void );
102long mach_max_dma_address = 0x00ffffff; /* default set to the lower 16MB */
103#ifdef CONFIG_HEARTBEAT
104void (*mach_heartbeat) (int);
105EXPORT_SYMBOL(mach_heartbeat);
106#endif
107#ifdef CONFIG_M68K_L2_CACHE
108void (*mach_l2_flush) (int);
109#endif
110#if defined(CONFIG_ISA) && defined(MULTI_ISA)
111int isa_type;
112int isa_sex;
113EXPORT_SYMBOL(isa_type);
114EXPORT_SYMBOL(isa_sex);
115#endif
116
117extern int amiga_parse_bootinfo(const struct bi_record *);
118extern int atari_parse_bootinfo(const struct bi_record *);
119extern int mac_parse_bootinfo(const struct bi_record *);
120extern int q40_parse_bootinfo(const struct bi_record *);
121extern int bvme6000_parse_bootinfo(const struct bi_record *);
122extern int mvme16x_parse_bootinfo(const struct bi_record *);
123extern int mvme147_parse_bootinfo(const struct bi_record *);
124extern int hp300_parse_bootinfo(const struct bi_record *);
125extern int apollo_parse_bootinfo(const struct bi_record *);
126
127extern void config_amiga(void);
128extern void config_atari(void);
129extern void config_mac(void);
130extern void config_sun3(void);
131extern void config_apollo(void);
132extern void config_mvme147(void);
133extern void config_mvme16x(void);
134extern void config_bvme6000(void);
135extern void config_hp300(void);
136extern void config_q40(void);
137extern void config_sun3x(void);
138
139#define MASK_256K 0xfffc0000
140
141extern void paging_init(void);
142
143static void __init m68k_parse_bootinfo(const struct bi_record *record)
144{
145 uint16_t tag;
146
147 save_bootinfo(record);
148
149 while ((tag = be16_to_cpu(record->tag)) != BI_LAST) {
150 int unknown = 0;
151 const void *data = record->data;
152 uint16_t size = be16_to_cpu(record->size);
153
154 switch (tag) {
155 case BI_MACHTYPE:
156 case BI_CPUTYPE:
157 case BI_FPUTYPE:
158 case BI_MMUTYPE:
159 /* Already set up by head.S */
160 break;
161
162 case BI_MEMCHUNK:
163 if (m68k_num_memory < NUM_MEMINFO) {
164 const struct mem_info *m = data;
165 m68k_memory[m68k_num_memory].addr =
166 be32_to_cpu(m->addr);
167 m68k_memory[m68k_num_memory].size =
168 be32_to_cpu(m->size);
169 m68k_num_memory++;
170 } else
171 pr_warn("%s: too many memory chunks\n",
172 __func__);
173 break;
174
175 case BI_RAMDISK:
176 {
177 const struct mem_info *m = data;
178 m68k_ramdisk.addr = be32_to_cpu(m->addr);
179 m68k_ramdisk.size = be32_to_cpu(m->size);
180 }
181 break;
182
183 case BI_COMMAND_LINE:
184 strlcpy(m68k_command_line, data,
185 sizeof(m68k_command_line));
186 break;
187
188 default:
189 if (MACH_IS_AMIGA)
190 unknown = amiga_parse_bootinfo(record);
191 else if (MACH_IS_ATARI)
192 unknown = atari_parse_bootinfo(record);
193 else if (MACH_IS_MAC)
194 unknown = mac_parse_bootinfo(record);
195 else if (MACH_IS_Q40)
196 unknown = q40_parse_bootinfo(record);
197 else if (MACH_IS_BVME6000)
198 unknown = bvme6000_parse_bootinfo(record);
199 else if (MACH_IS_MVME16x)
200 unknown = mvme16x_parse_bootinfo(record);
201 else if (MACH_IS_MVME147)
202 unknown = mvme147_parse_bootinfo(record);
203 else if (MACH_IS_HP300)
204 unknown = hp300_parse_bootinfo(record);
205 else if (MACH_IS_APOLLO)
206 unknown = apollo_parse_bootinfo(record);
207 else
208 unknown = 1;
209 }
210 if (unknown)
211 pr_warn("%s: unknown tag 0x%04x ignored\n", __func__,
212 tag);
213 record = (struct bi_record *)((unsigned long)record + size);
214 }
215
216 m68k_realnum_memory = m68k_num_memory;
217#ifdef CONFIG_SINGLE_MEMORY_CHUNK
218 if (m68k_num_memory > 1) {
219 pr_warn("%s: ignoring last %i chunks of physical memory\n",
220 __func__, (m68k_num_memory - 1));
221 m68k_num_memory = 1;
222 }
223#endif
224}
225
226void __init setup_arch(char **cmdline_p)
227{
228 /* The bootinfo is located right after the kernel */
229 if (!CPU_IS_COLDFIRE)
230 m68k_parse_bootinfo((const struct bi_record *)_end);
231
232 if (CPU_IS_040)
233 m68k_is040or060 = 4;
234 else if (CPU_IS_060)
235 m68k_is040or060 = 6;
236
237 /* FIXME: m68k_fputype is passed in by Penguin booter, which can
238 * be confused by software FPU emulation. BEWARE.
239 * We should really do our own FPU check at startup.
240 * [what do we do with buggy 68LC040s? if we have problems
241 * with them, we should add a test to check_bugs() below] */
242#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY)
243 /* clear the fpu if we have one */
244 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) {
245 volatile int zero = 0;
246 asm volatile ("frestore %0" : : "m" (zero));
247 }
248#endif
249
250 if (CPU_IS_060) {
251 u32 pcr;
252
253 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
254 : "=d" (pcr));
255 if (((pcr >> 8) & 0xff) <= 5) {
256 pr_warn("Enabling workaround for errata I14\n");
257 asm (".chip 68060; movec %0,%%pcr; .chip 68k"
258 : : "d" (pcr | 0x20));
259 }
260 }
261
262 init_mm.start_code = PAGE_OFFSET;
263 init_mm.end_code = (unsigned long)_etext;
264 init_mm.end_data = (unsigned long)_edata;
265 init_mm.brk = (unsigned long)_end;
266
267#if defined(CONFIG_BOOTPARAM)
268 strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE);
269 m68k_command_line[CL_SIZE - 1] = 0;
270#endif /* CONFIG_BOOTPARAM */
271 process_uboot_commandline(&m68k_command_line[0], CL_SIZE);
272 *cmdline_p = m68k_command_line;
273 memcpy(boot_command_line, *cmdline_p, CL_SIZE);
274
275 parse_early_param();
276
277 switch (m68k_machtype) {
278#ifdef CONFIG_AMIGA
279 case MACH_AMIGA:
280 config_amiga();
281 break;
282#endif
283#ifdef CONFIG_ATARI
284 case MACH_ATARI:
285 config_atari();
286 break;
287#endif
288#ifdef CONFIG_MAC
289 case MACH_MAC:
290 config_mac();
291 break;
292#endif
293#ifdef CONFIG_SUN3
294 case MACH_SUN3:
295 config_sun3();
296 break;
297#endif
298#ifdef CONFIG_APOLLO
299 case MACH_APOLLO:
300 config_apollo();
301 break;
302#endif
303#ifdef CONFIG_MVME147
304 case MACH_MVME147:
305 config_mvme147();
306 break;
307#endif
308#ifdef CONFIG_MVME16x
309 case MACH_MVME16x:
310 config_mvme16x();
311 break;
312#endif
313#ifdef CONFIG_BVME6000
314 case MACH_BVME6000:
315 config_bvme6000();
316 break;
317#endif
318#ifdef CONFIG_HP300
319 case MACH_HP300:
320 config_hp300();
321 break;
322#endif
323#ifdef CONFIG_Q40
324 case MACH_Q40:
325 config_q40();
326 break;
327#endif
328#ifdef CONFIG_SUN3X
329 case MACH_SUN3X:
330 config_sun3x();
331 break;
332#endif
333#ifdef CONFIG_COLDFIRE
334 case MACH_M54XX:
335 case MACH_M5441X:
336 cf_bootmem_alloc();
337 cf_mmu_context_init();
338 config_BSP(NULL, 0);
339 break;
340#endif
341 default:
342 panic("No configuration setup");
343 }
344
345 paging_init();
346
347#ifdef CONFIG_NATFEAT
348 nf_init();
349#endif
350
351#ifndef CONFIG_SUN3
352#ifdef CONFIG_BLK_DEV_INITRD
353 if (m68k_ramdisk.size) {
354 memblock_reserve(m68k_ramdisk.addr, m68k_ramdisk.size);
355 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
356 initrd_end = initrd_start + m68k_ramdisk.size;
357 pr_info("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
358 }
359#endif
360
361#ifdef CONFIG_ATARI
362 if (MACH_IS_ATARI)
363 atari_stram_reserve_pages((void *)availmem);
364#endif
365#ifdef CONFIG_SUN3X
366 if (MACH_IS_SUN3X) {
367 dvma_init();
368 }
369#endif
370
371#endif /* !CONFIG_SUN3 */
372
373/* set ISA defs early as possible */
374#if defined(CONFIG_ISA) && defined(MULTI_ISA)
375 if (MACH_IS_Q40) {
376 isa_type = ISA_TYPE_Q40;
377 isa_sex = 0;
378 }
379#ifdef CONFIG_AMIGA_PCMCIA
380 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
381 isa_type = ISA_TYPE_AG;
382 isa_sex = 1;
383 }
384#endif
385#ifdef CONFIG_ATARI_ROM_ISA
386 if (MACH_IS_ATARI) {
387 isa_type = ISA_TYPE_ENEC;
388 isa_sex = 0;
389 }
390#endif
391#endif
392}
393
394static int show_cpuinfo(struct seq_file *m, void *v)
395{
396 const char *cpu, *mmu, *fpu;
397 unsigned long clockfreq, clockfactor;
398
399#define LOOP_CYCLES_68020 (8)
400#define LOOP_CYCLES_68030 (8)
401#define LOOP_CYCLES_68040 (3)
402#define LOOP_CYCLES_68060 (1)
403#define LOOP_CYCLES_COLDFIRE (2)
404
405 if (CPU_IS_020) {
406 cpu = "68020";
407 clockfactor = LOOP_CYCLES_68020;
408 } else if (CPU_IS_030) {
409 cpu = "68030";
410 clockfactor = LOOP_CYCLES_68030;
411 } else if (CPU_IS_040) {
412 cpu = "68040";
413 clockfactor = LOOP_CYCLES_68040;
414 } else if (CPU_IS_060) {
415 cpu = "68060";
416 clockfactor = LOOP_CYCLES_68060;
417 } else if (CPU_IS_COLDFIRE) {
418 cpu = "ColdFire";
419 clockfactor = LOOP_CYCLES_COLDFIRE;
420 } else {
421 cpu = "680x0";
422 clockfactor = 0;
423 }
424
425#ifdef CONFIG_M68KFPU_EMU_ONLY
426 fpu = "none(soft float)";
427#else
428 if (m68k_fputype & FPU_68881)
429 fpu = "68881";
430 else if (m68k_fputype & FPU_68882)
431 fpu = "68882";
432 else if (m68k_fputype & FPU_68040)
433 fpu = "68040";
434 else if (m68k_fputype & FPU_68060)
435 fpu = "68060";
436 else if (m68k_fputype & FPU_SUNFPA)
437 fpu = "Sun FPA";
438 else if (m68k_fputype & FPU_COLDFIRE)
439 fpu = "ColdFire";
440 else
441 fpu = "none";
442#endif
443
444 if (m68k_mmutype & MMU_68851)
445 mmu = "68851";
446 else if (m68k_mmutype & MMU_68030)
447 mmu = "68030";
448 else if (m68k_mmutype & MMU_68040)
449 mmu = "68040";
450 else if (m68k_mmutype & MMU_68060)
451 mmu = "68060";
452 else if (m68k_mmutype & MMU_SUN3)
453 mmu = "Sun-3";
454 else if (m68k_mmutype & MMU_APOLLO)
455 mmu = "Apollo";
456 else if (m68k_mmutype & MMU_COLDFIRE)
457 mmu = "ColdFire";
458 else
459 mmu = "unknown";
460
461 clockfreq = loops_per_jiffy * HZ * clockfactor;
462
463 seq_printf(m, "CPU:\t\t%s\n"
464 "MMU:\t\t%s\n"
465 "FPU:\t\t%s\n"
466 "Clocking:\t%lu.%1luMHz\n"
467 "BogoMips:\t%lu.%02lu\n"
468 "Calibration:\t%lu loops\n",
469 cpu, mmu, fpu,
470 clockfreq/1000000,(clockfreq/100000)%10,
471 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
472 loops_per_jiffy);
473 return 0;
474}
475
476static void *c_start(struct seq_file *m, loff_t *pos)
477{
478 return *pos < 1 ? (void *)1 : NULL;
479}
480static void *c_next(struct seq_file *m, void *v, loff_t *pos)
481{
482 ++*pos;
483 return NULL;
484}
485static void c_stop(struct seq_file *m, void *v)
486{
487}
488const struct seq_operations cpuinfo_op = {
489 .start = c_start,
490 .next = c_next,
491 .stop = c_stop,
492 .show = show_cpuinfo,
493};
494
495#ifdef CONFIG_PROC_HARDWARE
496static int hardware_proc_show(struct seq_file *m, void *v)
497{
498 char model[80];
499 unsigned long mem;
500 int i;
501
502 if (mach_get_model)
503 mach_get_model(model);
504 else
505 strcpy(model, "Unknown m68k");
506
507 seq_printf(m, "Model:\t\t%s\n", model);
508 for (mem = 0, i = 0; i < m68k_num_memory; i++)
509 mem += m68k_memory[i].size;
510 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
511
512 if (mach_get_hardware_list)
513 mach_get_hardware_list(m);
514
515 return 0;
516}
517
518static int __init proc_hardware_init(void)
519{
520 proc_create_single("hardware", 0, NULL, hardware_proc_show);
521 return 0;
522}
523module_init(proc_hardware_init);
524#endif
525
526void check_bugs(void)
527{
528#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU)
529 if (m68k_fputype == 0) {
530 pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
531 "WHICH IS REQUIRED BY LINUX/M68K ***\n");
532 pr_emerg("Upgrade your hardware or join the FPU "
533 "emulation project\n");
534 panic("no FPU");
535 }
536#endif /* !CONFIG_M68KFPU_EMU */
537}
538
539#ifdef CONFIG_ADB
540static int __init adb_probe_sync_enable (char *str) {
541 extern int __adb_probe_sync;
542 __adb_probe_sync = 1;
543 return 1;
544}
545
546__setup("adb_sync", adb_probe_sync_enable);
547#endif /* CONFIG_ADB */
548
549#if IS_ENABLED(CONFIG_NVRAM)
550#ifdef CONFIG_MAC
551static unsigned char m68k_nvram_read_byte(int addr)
552{
553 if (MACH_IS_MAC)
554 return mac_pram_read_byte(addr);
555 return 0xff;
556}
557
558static void m68k_nvram_write_byte(unsigned char val, int addr)
559{
560 if (MACH_IS_MAC)
561 mac_pram_write_byte(val, addr);
562}
563#endif /* CONFIG_MAC */
564
565#ifdef CONFIG_ATARI
566static ssize_t m68k_nvram_read(char *buf, size_t count, loff_t *ppos)
567{
568 if (MACH_IS_ATARI)
569 return atari_nvram_read(buf, count, ppos);
570 else if (MACH_IS_MAC)
571 return nvram_read_bytes(buf, count, ppos);
572 return -EINVAL;
573}
574
575static ssize_t m68k_nvram_write(char *buf, size_t count, loff_t *ppos)
576{
577 if (MACH_IS_ATARI)
578 return atari_nvram_write(buf, count, ppos);
579 else if (MACH_IS_MAC)
580 return nvram_write_bytes(buf, count, ppos);
581 return -EINVAL;
582}
583
584static long m68k_nvram_set_checksum(void)
585{
586 if (MACH_IS_ATARI)
587 return atari_nvram_set_checksum();
588 return -EINVAL;
589}
590
591static long m68k_nvram_initialize(void)
592{
593 if (MACH_IS_ATARI)
594 return atari_nvram_initialize();
595 return -EINVAL;
596}
597#endif /* CONFIG_ATARI */
598
599static ssize_t m68k_nvram_get_size(void)
600{
601 if (MACH_IS_ATARI)
602 return atari_nvram_get_size();
603 else if (MACH_IS_MAC)
604 return mac_pram_get_size();
605 return -ENODEV;
606}
607
608/* Atari device drivers call .read (to get checksum validation) whereas
609 * Mac and PowerMac device drivers just use .read_byte.
610 */
611const struct nvram_ops arch_nvram_ops = {
612#ifdef CONFIG_MAC
613 .read_byte = m68k_nvram_read_byte,
614 .write_byte = m68k_nvram_write_byte,
615#endif
616#ifdef CONFIG_ATARI
617 .read = m68k_nvram_read,
618 .write = m68k_nvram_write,
619 .set_checksum = m68k_nvram_set_checksum,
620 .initialize = m68k_nvram_initialize,
621#endif
622 .get_size = m68k_nvram_get_size,
623};
624EXPORT_SYMBOL(arch_nvram_ops);
625#endif /* CONFIG_NVRAM */
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/arch/m68k/kernel/setup.c
4 *
5 * Copyright (C) 1995 Hamish Macdonald
6 */
7
8/*
9 * This file handles the architecture-dependent parts of system setup
10 */
11
12#include <linux/kernel.h>
13#include <linux/mm.h>
14#include <linux/sched.h>
15#include <linux/delay.h>
16#include <linux/interrupt.h>
17#include <linux/fs.h>
18#include <linux/console.h>
19#include <linux/errno.h>
20#include <linux/string.h>
21#include <linux/init.h>
22#include <linux/memblock.h>
23#include <linux/proc_fs.h>
24#include <linux/seq_file.h>
25#include <linux/module.h>
26#include <linux/nvram.h>
27#include <linux/initrd.h>
28#include <linux/random.h>
29
30#include <asm/bootinfo.h>
31#include <asm/byteorder.h>
32#include <asm/sections.h>
33#include <asm/setup.h>
34#include <asm/fpu.h>
35#include <asm/irq.h>
36#include <asm/io.h>
37#include <asm/machdep.h>
38#ifdef CONFIG_AMIGA
39#include <asm/amigahw.h>
40#endif
41#include <asm/atarihw.h>
42#ifdef CONFIG_ATARI
43#include <asm/atari_stram.h>
44#endif
45#ifdef CONFIG_SUN3X
46#include <asm/dvma.h>
47#endif
48#include <asm/macintosh.h>
49#include <asm/natfeat.h>
50#include <asm/config.h>
51
52#if !FPSTATESIZE || !NR_IRQS
53#warning No CPU/platform type selected, your kernel will not work!
54#warning Are you building an allnoconfig kernel?
55#endif
56
57unsigned long m68k_machtype;
58EXPORT_SYMBOL(m68k_machtype);
59unsigned long m68k_cputype;
60EXPORT_SYMBOL(m68k_cputype);
61unsigned long m68k_fputype;
62unsigned long m68k_mmutype;
63EXPORT_SYMBOL(m68k_mmutype);
64#ifdef CONFIG_VME
65unsigned long vme_brdtype;
66EXPORT_SYMBOL(vme_brdtype);
67#endif
68
69int m68k_is040or060;
70EXPORT_SYMBOL(m68k_is040or060);
71
72extern unsigned long availmem;
73
74int m68k_num_memory;
75EXPORT_SYMBOL(m68k_num_memory);
76int m68k_realnum_memory;
77EXPORT_SYMBOL(m68k_realnum_memory);
78unsigned long m68k_memoffset;
79struct m68k_mem_info m68k_memory[NUM_MEMINFO];
80EXPORT_SYMBOL(m68k_memory);
81
82static struct m68k_mem_info m68k_ramdisk __initdata;
83
84static char m68k_command_line[CL_SIZE] __initdata;
85
86void (*mach_sched_init) (void) __initdata = NULL;
87/* machine dependent irq functions */
88void (*mach_init_IRQ) (void) __initdata = NULL;
89void (*mach_get_model) (char *model);
90void (*mach_get_hardware_list) (struct seq_file *m);
91void (*mach_reset)( void );
92void (*mach_halt)( void );
93#ifdef CONFIG_HEARTBEAT
94void (*mach_heartbeat) (int);
95EXPORT_SYMBOL(mach_heartbeat);
96#endif
97#ifdef CONFIG_M68K_L2_CACHE
98void (*mach_l2_flush) (int);
99#endif
100#if defined(CONFIG_ISA) && defined(MULTI_ISA)
101int isa_type;
102int isa_sex;
103EXPORT_SYMBOL(isa_type);
104EXPORT_SYMBOL(isa_sex);
105#endif
106
107#define MASK_256K 0xfffc0000
108
109extern void paging_init(void);
110
111static void __init m68k_parse_bootinfo(const struct bi_record *record)
112{
113 const struct bi_record *first_record = record;
114 uint16_t tag;
115
116 while ((tag = be16_to_cpu(record->tag)) != BI_LAST) {
117 int unknown = 0;
118 const void *data = record->data;
119 uint16_t size = be16_to_cpu(record->size);
120
121 switch (tag) {
122 case BI_MACHTYPE:
123 case BI_CPUTYPE:
124 case BI_FPUTYPE:
125 case BI_MMUTYPE:
126 /* Already set up by head.S */
127 break;
128
129 case BI_MEMCHUNK:
130 if (m68k_num_memory < NUM_MEMINFO) {
131 const struct mem_info *m = data;
132 m68k_memory[m68k_num_memory].addr =
133 be32_to_cpu(m->addr);
134 m68k_memory[m68k_num_memory].size =
135 be32_to_cpu(m->size);
136 m68k_num_memory++;
137 } else
138 pr_warn("%s: too many memory chunks\n",
139 __func__);
140 break;
141
142 case BI_RAMDISK:
143 {
144 const struct mem_info *m = data;
145 m68k_ramdisk.addr = be32_to_cpu(m->addr);
146 m68k_ramdisk.size = be32_to_cpu(m->size);
147 }
148 break;
149
150 case BI_COMMAND_LINE:
151 strscpy(m68k_command_line, data,
152 sizeof(m68k_command_line));
153 break;
154
155 case BI_RNG_SEED: {
156 u16 len = be16_to_cpup(data);
157 add_bootloader_randomness(data + 2, len);
158 /*
159 * Zero the data to preserve forward secrecy, and zero the
160 * length to prevent kexec from using it.
161 */
162 memzero_explicit((void *)data, len + 2);
163 break;
164 }
165
166 default:
167 if (MACH_IS_AMIGA)
168 unknown = amiga_parse_bootinfo(record);
169 else if (MACH_IS_ATARI)
170 unknown = atari_parse_bootinfo(record);
171 else if (MACH_IS_MAC)
172 unknown = mac_parse_bootinfo(record);
173 else if (MACH_IS_Q40)
174 unknown = q40_parse_bootinfo(record);
175 else if (MACH_IS_BVME6000)
176 unknown = bvme6000_parse_bootinfo(record);
177 else if (MACH_IS_MVME16x)
178 unknown = mvme16x_parse_bootinfo(record);
179 else if (MACH_IS_MVME147)
180 unknown = mvme147_parse_bootinfo(record);
181 else if (MACH_IS_HP300)
182 unknown = hp300_parse_bootinfo(record);
183 else if (MACH_IS_APOLLO)
184 unknown = apollo_parse_bootinfo(record);
185 else if (MACH_IS_VIRT)
186 unknown = virt_parse_bootinfo(record);
187 else
188 unknown = 1;
189 }
190 if (unknown)
191 pr_warn("%s: unknown tag 0x%04x ignored\n", __func__,
192 tag);
193 record = (struct bi_record *)((unsigned long)record + size);
194 }
195
196 save_bootinfo(first_record);
197
198 m68k_realnum_memory = m68k_num_memory;
199#ifdef CONFIG_SINGLE_MEMORY_CHUNK
200 if (m68k_num_memory > 1) {
201 pr_warn("%s: ignoring last %i chunks of physical memory\n",
202 __func__, (m68k_num_memory - 1));
203 m68k_num_memory = 1;
204 }
205#endif
206}
207
208void __init setup_arch(char **cmdline_p)
209{
210 /* The bootinfo is located right after the kernel */
211 if (!CPU_IS_COLDFIRE)
212 m68k_parse_bootinfo((const struct bi_record *)_end);
213
214 if (CPU_IS_040)
215 m68k_is040or060 = 4;
216 else if (CPU_IS_060)
217 m68k_is040or060 = 6;
218
219 /* FIXME: m68k_fputype is passed in by Penguin booter, which can
220 * be confused by software FPU emulation. BEWARE.
221 * We should really do our own FPU check at startup.
222 * [what do we do with buggy 68LC040s? if we have problems
223 * with them, we should add a test to check_bugs() below] */
224#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU_ONLY)
225 /* clear the fpu if we have one */
226 if (m68k_fputype & (FPU_68881|FPU_68882|FPU_68040|FPU_68060|FPU_COLDFIRE)) {
227 volatile int zero = 0;
228 asm volatile ("frestore %0" : : "m" (zero));
229 }
230#endif
231
232 if (CPU_IS_060) {
233 u32 pcr;
234
235 asm (".chip 68060; movec %%pcr,%0; .chip 68k"
236 : "=d" (pcr));
237 if (((pcr >> 8) & 0xff) <= 5) {
238 pr_warn("Enabling workaround for errata I14\n");
239 asm (".chip 68060; movec %0,%%pcr; .chip 68k"
240 : : "d" (pcr | 0x20));
241 }
242 }
243
244 setup_initial_init_mm((void *)PAGE_OFFSET, _etext, _edata, _end);
245
246#if defined(CONFIG_BOOTPARAM)
247 strncpy(m68k_command_line, CONFIG_BOOTPARAM_STRING, CL_SIZE);
248 m68k_command_line[CL_SIZE - 1] = 0;
249#endif /* CONFIG_BOOTPARAM */
250 process_uboot_commandline(&m68k_command_line[0], CL_SIZE);
251 *cmdline_p = m68k_command_line;
252 memcpy(boot_command_line, *cmdline_p, CL_SIZE);
253
254 parse_early_param();
255
256 switch (m68k_machtype) {
257#ifdef CONFIG_AMIGA
258 case MACH_AMIGA:
259 config_amiga();
260 break;
261#endif
262#ifdef CONFIG_ATARI
263 case MACH_ATARI:
264 config_atari();
265 break;
266#endif
267#ifdef CONFIG_MAC
268 case MACH_MAC:
269 config_mac();
270 break;
271#endif
272#ifdef CONFIG_SUN3
273 case MACH_SUN3:
274 config_sun3();
275 break;
276#endif
277#ifdef CONFIG_APOLLO
278 case MACH_APOLLO:
279 config_apollo();
280 break;
281#endif
282#ifdef CONFIG_MVME147
283 case MACH_MVME147:
284 config_mvme147();
285 break;
286#endif
287#ifdef CONFIG_MVME16x
288 case MACH_MVME16x:
289 config_mvme16x();
290 break;
291#endif
292#ifdef CONFIG_BVME6000
293 case MACH_BVME6000:
294 config_bvme6000();
295 break;
296#endif
297#ifdef CONFIG_HP300
298 case MACH_HP300:
299 config_hp300();
300 break;
301#endif
302#ifdef CONFIG_Q40
303 case MACH_Q40:
304 config_q40();
305 break;
306#endif
307#ifdef CONFIG_SUN3X
308 case MACH_SUN3X:
309 config_sun3x();
310 break;
311#endif
312#ifdef CONFIG_COLDFIRE
313 case MACH_M54XX:
314 case MACH_M5441X:
315 cf_bootmem_alloc();
316 cf_mmu_context_init();
317 config_BSP(NULL, 0);
318 break;
319#endif
320#ifdef CONFIG_VIRT
321 case MACH_VIRT:
322 config_virt();
323 break;
324#endif
325 default:
326 panic("No configuration setup");
327 }
328
329#ifdef CONFIG_BLK_DEV_INITRD
330 if (m68k_ramdisk.size) {
331 memblock_reserve(m68k_ramdisk.addr, m68k_ramdisk.size);
332 initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
333 initrd_end = initrd_start + m68k_ramdisk.size;
334 pr_info("initrd: %08lx - %08lx\n", initrd_start, initrd_end);
335 }
336#endif
337
338 paging_init();
339
340#ifdef CONFIG_NATFEAT
341 nf_init();
342#endif
343
344#ifdef CONFIG_ATARI
345 if (MACH_IS_ATARI)
346 atari_stram_reserve_pages((void *)availmem);
347#endif
348#ifdef CONFIG_SUN3X
349 if (MACH_IS_SUN3X) {
350 dvma_init();
351 }
352#endif
353
354/* set ISA defs early as possible */
355#if defined(CONFIG_ISA) && defined(MULTI_ISA)
356 if (MACH_IS_Q40) {
357 isa_type = ISA_TYPE_Q40;
358 isa_sex = 0;
359 }
360#ifdef CONFIG_AMIGA_PCMCIA
361 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(PCMCIA)) {
362 isa_type = ISA_TYPE_AG;
363 isa_sex = 1;
364 }
365#endif
366#ifdef CONFIG_ATARI_ROM_ISA
367 if (MACH_IS_ATARI) {
368 isa_type = ISA_TYPE_ENEC;
369 isa_sex = 0;
370 }
371#endif
372#endif
373}
374
375static int show_cpuinfo(struct seq_file *m, void *v)
376{
377 const char *cpu, *mmu, *fpu;
378 unsigned long clockfreq, clockfactor;
379
380#define LOOP_CYCLES_68020 (8)
381#define LOOP_CYCLES_68030 (8)
382#define LOOP_CYCLES_68040 (3)
383#define LOOP_CYCLES_68060 (1)
384#define LOOP_CYCLES_COLDFIRE (2)
385
386 if (CPU_IS_020) {
387 cpu = "68020";
388 clockfactor = LOOP_CYCLES_68020;
389 } else if (CPU_IS_030) {
390 cpu = "68030";
391 clockfactor = LOOP_CYCLES_68030;
392 } else if (CPU_IS_040) {
393 cpu = "68040";
394 clockfactor = LOOP_CYCLES_68040;
395 } else if (CPU_IS_060) {
396 cpu = "68060";
397 clockfactor = LOOP_CYCLES_68060;
398 } else if (CPU_IS_COLDFIRE) {
399 cpu = "ColdFire";
400 clockfactor = LOOP_CYCLES_COLDFIRE;
401 } else {
402 cpu = "680x0";
403 clockfactor = 0;
404 }
405
406#ifdef CONFIG_M68KFPU_EMU_ONLY
407 fpu = "none(soft float)";
408#else
409 if (m68k_fputype & FPU_68881)
410 fpu = "68881";
411 else if (m68k_fputype & FPU_68882)
412 fpu = "68882";
413 else if (m68k_fputype & FPU_68040)
414 fpu = "68040";
415 else if (m68k_fputype & FPU_68060)
416 fpu = "68060";
417 else if (m68k_fputype & FPU_SUNFPA)
418 fpu = "Sun FPA";
419 else if (m68k_fputype & FPU_COLDFIRE)
420 fpu = "ColdFire";
421 else
422 fpu = "none";
423#endif
424
425 if (m68k_mmutype & MMU_68851)
426 mmu = "68851";
427 else if (m68k_mmutype & MMU_68030)
428 mmu = "68030";
429 else if (m68k_mmutype & MMU_68040)
430 mmu = "68040";
431 else if (m68k_mmutype & MMU_68060)
432 mmu = "68060";
433 else if (m68k_mmutype & MMU_SUN3)
434 mmu = "Sun-3";
435 else if (m68k_mmutype & MMU_APOLLO)
436 mmu = "Apollo";
437 else if (m68k_mmutype & MMU_COLDFIRE)
438 mmu = "ColdFire";
439 else
440 mmu = "unknown";
441
442 clockfreq = loops_per_jiffy * HZ * clockfactor;
443
444 seq_printf(m, "CPU:\t\t%s\n"
445 "MMU:\t\t%s\n"
446 "FPU:\t\t%s\n"
447 "Clocking:\t%lu.%1luMHz\n"
448 "BogoMips:\t%lu.%02lu\n"
449 "Calibration:\t%lu loops\n",
450 cpu, mmu, fpu,
451 clockfreq/1000000,(clockfreq/100000)%10,
452 loops_per_jiffy/(500000/HZ),(loops_per_jiffy/(5000/HZ))%100,
453 loops_per_jiffy);
454 return 0;
455}
456
457static void *c_start(struct seq_file *m, loff_t *pos)
458{
459 return *pos < 1 ? (void *)1 : NULL;
460}
461static void *c_next(struct seq_file *m, void *v, loff_t *pos)
462{
463 ++*pos;
464 return NULL;
465}
466static void c_stop(struct seq_file *m, void *v)
467{
468}
469const struct seq_operations cpuinfo_op = {
470 .start = c_start,
471 .next = c_next,
472 .stop = c_stop,
473 .show = show_cpuinfo,
474};
475
476#ifdef CONFIG_PROC_HARDWARE
477static int hardware_proc_show(struct seq_file *m, void *v)
478{
479 char model[80];
480 unsigned long mem;
481 int i;
482
483 if (mach_get_model)
484 mach_get_model(model);
485 else
486 strcpy(model, "Unknown m68k");
487
488 seq_printf(m, "Model:\t\t%s\n", model);
489 for (mem = 0, i = 0; i < m68k_num_memory; i++)
490 mem += m68k_memory[i].size;
491 seq_printf(m, "System Memory:\t%ldK\n", mem >> 10);
492
493 if (mach_get_hardware_list)
494 mach_get_hardware_list(m);
495
496 return 0;
497}
498
499static int __init proc_hardware_init(void)
500{
501 proc_create_single("hardware", 0, NULL, hardware_proc_show);
502 return 0;
503}
504module_init(proc_hardware_init);
505#endif
506
507void check_bugs(void)
508{
509#if defined(CONFIG_FPU) && !defined(CONFIG_M68KFPU_EMU)
510 if (m68k_fputype == 0) {
511 pr_emerg("*** YOU DO NOT HAVE A FLOATING POINT UNIT, "
512 "WHICH IS REQUIRED BY LINUX/M68K ***\n");
513 pr_emerg("Upgrade your hardware or join the FPU "
514 "emulation project\n");
515 panic("no FPU");
516 }
517#endif /* !CONFIG_M68KFPU_EMU */
518}
519
520#ifdef CONFIG_ADB
521static int __init adb_probe_sync_enable (char *str) {
522 extern int __adb_probe_sync;
523 __adb_probe_sync = 1;
524 return 1;
525}
526
527__setup("adb_sync", adb_probe_sync_enable);
528#endif /* CONFIG_ADB */
529
530#if IS_ENABLED(CONFIG_NVRAM)
531#ifdef CONFIG_MAC
532static unsigned char m68k_nvram_read_byte(int addr)
533{
534 if (MACH_IS_MAC)
535 return mac_pram_read_byte(addr);
536 return 0xff;
537}
538
539static void m68k_nvram_write_byte(unsigned char val, int addr)
540{
541 if (MACH_IS_MAC)
542 mac_pram_write_byte(val, addr);
543}
544#endif /* CONFIG_MAC */
545
546#ifdef CONFIG_ATARI
547static ssize_t m68k_nvram_read(char *buf, size_t count, loff_t *ppos)
548{
549 if (MACH_IS_ATARI)
550 return atari_nvram_read(buf, count, ppos);
551 else if (MACH_IS_MAC)
552 return nvram_read_bytes(buf, count, ppos);
553 return -EINVAL;
554}
555
556static ssize_t m68k_nvram_write(char *buf, size_t count, loff_t *ppos)
557{
558 if (MACH_IS_ATARI)
559 return atari_nvram_write(buf, count, ppos);
560 else if (MACH_IS_MAC)
561 return nvram_write_bytes(buf, count, ppos);
562 return -EINVAL;
563}
564
565static long m68k_nvram_set_checksum(void)
566{
567 if (MACH_IS_ATARI)
568 return atari_nvram_set_checksum();
569 return -EINVAL;
570}
571
572static long m68k_nvram_initialize(void)
573{
574 if (MACH_IS_ATARI)
575 return atari_nvram_initialize();
576 return -EINVAL;
577}
578#endif /* CONFIG_ATARI */
579
580static ssize_t m68k_nvram_get_size(void)
581{
582 if (MACH_IS_ATARI)
583 return atari_nvram_get_size();
584 else if (MACH_IS_MAC)
585 return mac_pram_get_size();
586 return -ENODEV;
587}
588
589/* Atari device drivers call .read (to get checksum validation) whereas
590 * Mac and PowerMac device drivers just use .read_byte.
591 */
592const struct nvram_ops arch_nvram_ops = {
593#ifdef CONFIG_MAC
594 .read_byte = m68k_nvram_read_byte,
595 .write_byte = m68k_nvram_write_byte,
596#endif
597#ifdef CONFIG_ATARI
598 .read = m68k_nvram_read,
599 .write = m68k_nvram_write,
600 .set_checksum = m68k_nvram_set_checksum,
601 .initialize = m68k_nvram_initialize,
602#endif
603 .get_size = m68k_nvram_get_size,
604};
605EXPORT_SYMBOL(arch_nvram_ops);
606#endif /* CONFIG_NVRAM */